This ia a mounting tray for a Tamiya TT-01 Receiver, ESC & Fan. It provides 2x mounting holes for a 30mm x 30mm x 10mm fan, a Hobbywing 1060 ESC, a small receiver (max size is same as a FrSky TFR4), and for a antenna mount via a countersunk hole.
Also has 1x slot for a small tie-wrap to tidy cables near receiver.
The author marked this model as their own original creation.